1 /* $NetBSD: mount_autofs.c,v 1.5 2020/07/26 08:20:22 mlelstv Exp $ */
2
3 /*-
4 * Copyright (c) 2018 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31 #include <sys/cdefs.h>
32 #ifndef lint
33 __RCSID("$NetBSD: mount_autofs.c,v 1.5 2020/07/26 08:20:22 mlelstv Exp $");
34 #endif /* not lint */
35
36 #include <sys/param.h>
37 #include <sys/mount.h>
38
39 #include <err.h>
40 #include <unistd.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44
45 #include <mntopts.h>
46
47 #include <fs/autofs/autofs_mount.h>
48
49 #include "mountprog.h"
50 #include "mount_autofs.h"
51
52 static const struct mntopt mopts[] = {
53 MOPT_STDOPTS,
54 MOPT_GETARGS,
55 MOPT_NULL,
56 };
57
58 int mount_autofs(int argc, char **argv);
59 __dead static void usage(void);
60
61 #ifndef MOUNT_NOMAIN
62 int
main(int argc,char ** argv)63 main(int argc, char **argv)
64 {
65 return mount_autofs(argc, argv);
66 }
67 #endif
68
69 void
mount_autofs_parseargs(int argc,char * argv[],void * v,int * mntflags,char * canon_dev,char * canon_dir)70 mount_autofs_parseargs(int argc, char *argv[], void *v, int *mntflags,
71 char *canon_dev, char *canon_dir)
72 {
73 int ch;
74 mntoptparse_t mp;
75 struct autofs_args *am = v;
76
77 *mntflags = 0;
78 while ((ch = getopt(argc, argv, "f:o:O:p:")) != -1)
79 switch (ch) {
80 case 'f':
81 strlcpy(am->from, optarg, MAXPATHLEN);
82 break;
83 case 'o':
84 mp = getmntopts(optarg, mopts, mntflags, 0);
85 if (mp == NULL)
86 err(EXIT_FAILURE, "getmntopts");
87 freemntopts(mp);
88 break;
89 case 'O':
90 strlcpy(am->master_options, optarg, MAXPATHLEN);
91 break;
92 case 'p':
93 strlcpy(am->master_prefix, optarg, MAXPATHLEN);
94 break;
95 case '?':
96 default:
97 usage();
98 }
99 argc -= optind;
100 argv += optind;
101
102 if (argc != 2)
103 usage();
104
105 strlcpy(canon_dev, argv[0], MAXPATHLEN);
106 pathadj(argv[1], canon_dir);
107 }
108
109 int
mount_autofs(int argc,char * argv[])110 mount_autofs(int argc, char *argv[])
111 {
112 char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN];
113 char from[MAXPATHLEN], master_options[MAXPATHLEN];
114 char master_prefix[MAXPATHLEN];
115 int mntflags;
116 struct autofs_args am = {
117 .from = from,
118 .master_options = master_options,
119 .master_prefix = master_prefix,
120 };
121
122 mount_autofs_parseargs(argc, argv, &am, &mntflags,
123 canon_dev, canon_dir);
124 if (mount(MOUNT_KERNFS, canon_dir, mntflags, &am, sizeof(am)) == -1)
125 err(EXIT_FAILURE, "autofs on %s", canon_dir);
126 if (mntflags & MNT_GETARGS) {
127 printf("from=%s, master_options=%s, master_prefix=%s\n",
128 am.from, am.master_options, am.master_prefix);
129 }
130
131 return EXIT_SUCCESS;
132 }
133
134 static void
usage(void)135 usage(void)
136 {
137 (void)fprintf(stderr,
138 "Usage: %s [-f from] [-O autofs_options] [-o options] [-p prefix] "
139 "autofs mount_point\n", getprogname());
140 exit(EXIT_FAILURE);
141 }
142